I'm trying calculate the 90.1 appendix G baseline Fan power limitation pressure drop adjustment for energy recovery devices as outlined in table 6.5.3.1-2.
How does one calculate the enthalpy recovery ratio?
The formula is pretty straight forward (formula C8 in https://www.ahrinet.org/App_Content/ahri/files/STANDARDS/AHRI/AHRI_Standard_1061_SI_2018.pdf) but conditions at which h1, h2, and h3 are calculated is confusing me.
Basically I'm trying to figure out how one calculate this value from the input parameters of the HeatExchanger:AirToAir:SensibleAndLatent EnergyPlus object:
- Sensible Effectiveness at 100% Heating Air Flow
- Latent Effectiveness at 100% Heating Air Flow
- Sensible Effectiveness at 75% Heating Air Flow
- Latent Effectiveness at 75% Heating Air Flow
- Sensible Effectiveness at 100% Cooling Air Flow
- Latent Effectiveness at 100% Cooling Air Flow
- Sensible Effectiveness at 75% Cooling Air Flow
- Latent Effectiveness at 75% Cooling Air Flow
I'd like to repeat what ever process was done when developing the 90.1 2019 prototypes. I've backed into an enthalpy recovery ratio of 0.3637 be comparing San Diego (no ER) with Atlanta (Has ER), but i cant see a way to get there from the effectiveness numbers in the EnergyPlus object
PS how is there no "psychrometrics" tag? I'll use existing tags but I'd like to lodge a complaint.
